SLC38A8

Last update 08 May 2025

Basic Info

Synonyms

Putative sodium-coupled neutral amino acid transporter 8, SLC38A8, Solute carrier family 38 member 8

+ [1]

Introduction

Electrogenic sodium-dependent amino acid transporter with a preference for L-glutamine, L-alanine, L-histidine, L-aspartate and L-arginine. May facilitate glutamine uptake in both excitatory and inhibitory neurons. The transport mechanism and stoichiometry remain to be elucidated.

100 Clinical Results associated with SLC38A8

100 Translational Medicine associated with SLC38A8

0 Patents (Medical) associated with SLC38A8

Literatures (Medical) associated with SLC38A8

01 Jan 2025·European Journal of Ophthalmology

Expanding the mutational and phenotypical spectrum of FHONDA syndrome

Article

Author: Carvalho, Ana Luísa ; Marques, João Pedro ; Murta, Joaquim ; Quental, Hugo ; Teixeira, Bruno Magalhães ; Raimundo, Miguel ; Silva, Rufino ; Figueiredo, Inês

Foveal hypoplasia, optic nerve decussation, and anterior segment dysgenesis (FHONDA) is a rare recessively inherited syndrome first described in 2013. FHONDA is associated with biallelic disease-causing variants in the SLC38A8 gene, which has a strong expression in the photoreceptor layer. To date, 60 different disease-causing variants in the SLC38A8 gene have been described. In this cross-sectional case series, we included three unrelated female patients with FHONDA syndrome who presented with congenital nystagmus and decreased visual acuity from infancy. Best-corrected visual acuity was 20/100 OD and 20/60 OS for Patient 1 (P1) (72 years old); light perception OD and hand motion OS for Patient 2 (P2) (66 years old); and 20/100 OD and 20/100 OS for Patient 3 (P3) (25 years old). While normal retinal pigmentation was seen on P1 and P3, P2 presented retinal features of retinitis pigmentosa, including a pale optic nerve head, vessel thinning, and 360° dense bone spicule hyperpigmentation OU. Spectral-domain optical coherence tomography revealed grade 4 foveal hypoplasia in all patients. In P1 and P2, the novel class IV c.388 + 1G > T p.? variant in SLC38A8 was present in homozygosity; while P3 harboured the novel c.214G > C p.(Gly72Arg) variant in homozygosity, classified as class III. Thus, we expand the mutational spectrum of FHONDA by reporting two novel variants. In addition, we describe features of retinitis pigmentosa for the first time in a patient with biallelic homozygous S LC38A8 variants, thus broadening our understanding of the clinical phenotype associated with this rare syndrome.

01 Nov 2024·European Journal of Ophthalmology

Novel pathogenic variants of SLC38A8 gene and literature review

Review

Author: Ren, Xiaofang ; Wang, Jing ; Cheng, Shan ; Li, Ningdong ; Huang, Lijuan

Purpose This study aimed to analyze the clinical and genetic characteristics of 6 Chinese patients with foveal hypoplasia (FH) caused by the variants of solute carrier family 38 member 8 ( SLC38A8), and to describe the genotype and phenotype of SLC38A8 variants from previous literature. Methods All subjects underwent comprehensive ophthalmic examinations. Optical coherence tomography (OCT) was performed to evaluate the structural grade of FH. Pathogenic variants of SLC38A8 gene were identified using panel-based next-generation sequencing and direct Sanger sequencing techniques. Further, all previously reported cases of SLC38A8 variants were re-analyzed together with the novel ones identified in this study. Results Nystagmus and FH were present in 6 patients with variants of SLC38A8 gene, accompanied by a normal anterior segment. Grade 4 FH was identified in 4 patients. A total of 12 variants of SLC38A8 gene were identified, including 9 novel variants. Systematical analysis revealed that half of the variants (30/60) were missense, the majority of which (23/30) were distributed in the transmembrane (TM) domains. Grade 4 FH was detected in the majority of patients (66%, 23/35). There was no statistical difference in the clinical features between the subgroups of patients with 0, 1 and 2 missense variants. Conclusion Severe arrest of foveal development was identified in patients with variants of SLC38A8. This study provides a brief summary of the clinical and genetic characteristics of the pathogenic SLC38A8 variants, which is helpful in the differentiation diagnosis of FH.

02 Nov 2023·Ophthalmic Genetics

Expanding the mutational spectrum of FHONDA syndrome

Article

Author: Khodeiry, Mohamed M. ; Shoji, Marissa K. ; Mendoza, Carlos ; Sengillo, Jesse D.

AIMThe aim of the study is to present a rare case of Foveal Hypoplasia, Optic Nerve Decussation defects, and Anterior segment dysgenesis (FHONDA) confirmed by genetic testing with two separate pathogenic mutations in the SLC38A8 gene.MATERIALS AND METHODSThis was a case report.RESULTSA 3-month-old female presented to a neuro-ophthalmology clinic with nystagmus. Her past medical and family history was unremarkable. Her examination demonstrated horizontal pendular nystagmus and small optic nerves with foveal hypoplasia bilaterally. Neuroimaging was unremarkable. She underwent an examination under anesthesia and electroretinogram (ERG). Her anterior segment examination was normal, and dilated fundus examination demonstrated foveal hypoplasia with diffuse pigment granularity. The ERG was normal. Genetic testing revealed two mutations in the SLC38A8 gene, p.Glu233Lys:c.697 G>A (pathogenic) and p.Asp283Ala:c.848A>C (likely pathogenic) with positive parental segregation analysis. Therefore, she was diagnosed with FHONDA.CONCLUSIONSTo our knowledge, this is the first report of a patient with FHONDA who is compound heterozygous for these two SLC38A8 mutations, which represents an expansion of the known mutational spectrum associated with this syndrome. Moreover, it may provide guidance into genetic counseling for patients and parents with these mutations.

Analysis

Perform a panoramic analysis of this field.

view full example data

AI Agents Built for Biopharma Breakthroughs

Accelerate discovery. Empower decisions. Transform outcomes.

Get started for free today!

Accelerate Strategic R&D decision making with Synapse, PatSnap’s AI-powered Connected Innovation Intelligence Platform Built for Life Sciences Professionals.

Start your data trial now!

Synapse data is also accessible to external entities via APIs or data packages. Empower better decisions with the latest in pharmaceutical intelligence.

Bio

Bio Sequences Search & Analysis

Chemical

Chemical Structures Search & Analysis

SLC38A8

Basic Info

Related

Analysis